Constance Lambert embraces her dog after finding it alive when returning to her destroyed home in Tupelo, Miss., Monday. / AP/Brad Vest, The Commercial Appeal

by Doyle Rice and John Bacon, USA TODAY

by Doyle Rice and John Bacon, USA TODAY

Severe flooding in the panhandle of Florida was blamed for the death of a Pensacola woman Wednesday, raising to 36 the death toll from a series of violent storms accompanied by heavy rains rolling through parts of the Midwest, South and East since Sunday.

Tornado warnings had been posted for the Pensacola, Fla., area Tuesday evening, and the National Weather Service said several tornadoes touched down in eastern North Carolina.

Seventeen people were reported killed Monday after tornadoes roared through Alabama, Mississippi and Tennessee.

Rain soaked Alabama as it tried to recover from Monday's tornadoes. The Weather Channel reported widespread flash flooding along Alabama's Gulf Coast. Nearly 9 inches of rain fell in Mobile in one of the wettest days ever there.

The prolonged weather pattern was unusual, forecasters said, noting that Monday and Tuesday marked the first time in 22 years with 10 or more tornado deaths for two straight days.

The twisters and high winds flattened homes and businesses, uprooted trees and flipped cars across sections of the South and Midwest. The National Weather Service was investigating reports of almost 100 tornadoes. And the destruction may not be over yet.

More than 60 million people from southeastern Michigan to the central Gulf Coast to the Carolinas and southern Virginia were at risk of severe storms and tornadoes, AccuWeather meteorologist Alex Sosnowski said Tuesday.

Mississippi and Alabama remained the states with the highest risk of severe weather, with cities such as Meridian, Miss., and Birmingham, Ala., in the cross hairs for tornadoes, the weather service said.

The East Coast was not exempt. A forecast of ongoing heavy rain caused the weather service to issue flash-flood watches from northern Florida to southern New England.

Mississippi was hit the hardest Monday. The tornado that struck the Louisville, Miss., area was given a preliminary rating of at least EF4 by the National Weather Service. EF4 tornadoes have winds of 166-200 mph, making the Louisville twister the most powerful one to hit the USA this year.

Twelve deaths were reported in the state, nine of them in and around Louisville, a town of about 6,600 people. State Sen. Giles Ward said he was huddled in a bathroom with his wife, four other family members and their dog Monday night as a tornado destroyed his two-story brick house and turned his son-in-law's SUV upside down onto the patio in Louisville.

"Our family is OK, thank goodness," Ward told The Clarion-Ledger in Jackson. "Our house as well as all the houses in our neighborhood it appears are destroyed. But our family is safe."

Later, he texted: "I have never prayed so hard in my life. God is good. All we have lost is stuff."

In Tupelo, Miss., dozens of buildings were damaged and 30 people sought treatment at Northeast Mississippi Medical Center. Four people were admitted.

Two deaths were reported in Tennessee. In Lincoln County, the National Weather Service lifted an initial tornado warning shortly after 7 p.m. Monday, but at 8:24 p.m. it warned a tornado was coming. "Catastrophic damage likely with storm in Lincoln County," the message read. "170 (knots) of rotation with debris extending above 20,000 feet."

Within minutes, the warnings grew more dire with winds exceeding 190 mph, The Tennessean reported. Two people were killed in Lincoln County and several homes were destroyed, The Tennessean reports.

The warning seemingly came out of nowhere, said Chris Murdock, who lives 4 miles from a damaged elementary school. Although he and his family didn't see the tornado, the gusts and hail they saw as they went to a friend's basement were enough for him to know this wasn't an average spring storm.

"Just by the looks of it, you could tell something terrible was happening," he said.

In Arkansas, the death toll from Sunday's tornado stood at 15, 11 of them in Faulkner County, KTHV-TV reported. The tornado has been given a preliminary rating of at least EF3 (136-165 mph winds) by the National Weather Service, one of only two EF3 tornadoes to hit the USA so far this year.

It was the deadliest single tornado in Arkansas in 17 years, the weather service said.

President Obama has sent his condolences to those affected by tornadoes and promised that the federal government would help in the recovery.

"Your country will be there to help you recover and rebuild as long as it takes," Obama said.